body, p {
    margin: 0;
    padding: 0;
}

.out {
    display:flex;
    align-items:center;
    justify-content:center;
    text-align: center;
    position: absolute;
    width: 400px;
    height: 200px;
    margin: auto;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
}


.main {
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn {
    width: 170px;
    height: 60px;
    font-size: 18px;
    background: #afeeee;
    border: none;
    border-radius: 50px;
    color: #000;
    outline: none;
    cursor: pointer;
    transition: all 0.4s;
}

.btn:hover {
    box-shadow: inset 0 0 0 4px #ef476f,
    inset 0 0 0 8px #ffd166,
    inset 0 0 0 12px #06d6a0,
    inset 0 0 0 16px #118ab2;
    background: #073b4c;
    color: #fff;
}